Electric-switch lock



G. F. SCHLOTE.

' ELECTRIC SWITCH LOCK.

APPLICATION FILED MAY 15, 1918.

. 1,021. PatentedJl me 7,1921.

G. F. SCHLOTE.

ELECTRIC SWITCH LOCK.

APPLI CATION FILED. MAY :5, 191a.

Patented June 7, 1921.

2 SHEETS-SHEET 2.

. gnoenfoz ting the improved lock,

PATENT- OFFICE.

GUIDO SCHLOTE, OF AFTON, WYOMING.

ELECTRIC-SWITCH LooK.

Specification of Letters Patent.

Patented June 7, 19.21.

Application filed May 15, 1918. Serial No. 234,646.

To all whom it mwy concern:

Be it known that I, (dunno F- SGHLOTE, acitizen of Germany, residing at ,Afton, in

the county of Lincoln and State of Wyoming, have invented new and useful Improvements in Electric-Switch Locks, of

which the following is a specification.

The invention seeks to provide, as its principal object, a look, the keeper of which is provided with an electric switch grouped preferably in series with the lighting circuit of a room or apartment, so that a doorwith which it is used may be lockedfrom the outside, thereby operating the switch to open the lighting circuit of the room, in order that a person may not inadvertently leave the room allowing the lights therein to burn.

A further object of the invention seeks the provision of a lock of this character which is operable from the interior of the room without interference to the lighting circuit of the room.

A still further object is to provide a device of this character, which is simple in construction, durable and effective in operation and inexpensive to manufacture.

Still further and other objects will appear as the invention is set forth in detail in the following description.

To the exact construction in which it is shown and described, the invention is not to be restricted. The right is reserved to make such changes or alterations as the actotal reduction to practice may demand, in'

so far as such changes or alterations may be comprehended in "spirit by the annexed claim.

In the accompanying drawings Figure 1 is a'vertical sectional viewshow- Fig. 2 is a front elevational view showing the lock per 86, I

Fi 3 is a similar viewto Fig. 2, but showlng' the keeper in which is carried the electric switch device,

Fig. 4' is a section on the line 4-4 of Fig. 1.

eferring to the drawings, the invention is shown as comprising the lock proper A and its keeper B, the lock being designed for mounting upon the door and the keeper upon the frame, both being either of themortise .type or the rim type. v

In illustrating the invention, itis shown as applied to the mortise-style of lock. The

lock A comprises a casing 1 in which there" are carried the latches 2 and ,3, these two latches-being side by side, one on either side of a division plate 4 mounted in'the lock. The-lock is provided with "the key-holes 5 of which there are two, one on either side of the lock, so that the key 6 may enter the look from eitherfside as far as the division plate 4, when it can operate either of the the lock it is inserted.

Aside from having the twin latches 2. and 3, the look A is like "the conventional form of mortise lock. f

The keeper B on its front is closed by a detachable plate 7 which corresponds to the conventional form of striking plate, having the slots 8 and '9 for engagement with the latches 3 and 2 respectively@ The striking plate orcover 7 is of greater width than the casing 10 of the keeper which it closes, this casing 10 being directly back of the slots 8 and 9. Interior t0 the casing 10, there is a horizontally disposed bar .11, madepreferably square or rectangular in cross section and this bar at one end is secured to a plate '12 which in turn is attached by suitable screws 13 to the rear wall of the casing '10. Slidably mounted on the bar 11, there is a block 14, the rectangular or square shape of the bar precluding angular movement of the block. that it exceeds slightly in dimensions the dimensions of the slot 9, and it is held normally against the back of the striking plate 7 by a spiral spring15 which surrounds the bar 11 andbears at opposite ends upon the blocks 14 and on the plate 12,

On its bottom edge, the block 14 has secured to it by means of the screws 17, a bar 16 which is made of some insulating material, preferably fiber, and this bar carries on its lower face, a bowed spring-18 which is attached by means of screws 19. The spring 18 is made of some material of relatively this bar being made preferably of fiber and bein substantially identical with the bar 16. t is securedin place by the screws 21,

This block is of such a shape 7 nthe l and carries on its top face a bowed spring 22 which, is. secured in place by suitable screws such as those indicatedat 19, The

bowed spring 22. is similar to the spring '18,

both in shape and in the character of material used, and when the block 14 is against the striking plate 7, the two bowed springs are in contact at the highest points of their respective curve.

In the rear wall of the casing and adjacent the top, there is an insulating bushing 28 and in thesame wall, but near the bottom there is a second and similar insulating bushing 24. Through the former there is led an electric conducting wire' 25, the end of which is secured in any suitable manner to the end of the spring 18, the latter being formed so as to bend around the rear end of the block 16, and it is on this rear bent end of the spring 18 that the wire 25 is attached. The electric conducting wire 26, connects with the spring 22 in the same manner that the wire 25 connects with the spring 18, but this former, wire is led through the bushing 24.

In theuse of the invention, the lock A is mounted in the door and the keeper B in the two springs will be in contact and the light-l ing circuitg therefore, be intact. The device is designe for mounting in a door, so that when the key 6 is inserted from the inside f of the door, the latch 2 will be operated and the door may-by this means be locked from the inside without disturbance to'the electrio circuit. On locking the door from the outside, however, the latch 3 is operated and as it passes through the slot 8, it strikes against the end of the block 14, forcin the latter back against the pressure of the spring 15, this backward movement resulting in the separation of the springs 18 and 22 and opening the vlighting .circuit at this point. Therefore, the locking of the door from the outside will effectively prevent a person from inadvertently departing from and leaving the lights burning in a room, the door of which is equipped with the improved lock.

It will be observed that the wire 25 between the point where it enters the casing 10 and where it connects with the spring 18, is of suflicient length to permit the forward and backward movement of the block 14 without imposing u on the wire any strains that :would tend to amage it, since the wire is not subjected to any bend of practical moment. durin the backward and forwar movement of t e block.

The invention having been described, what is claimed as new and useful is:

In a device of the kind set forth, a casing, a detachable plate closing the casing at one side and formed with an opening therein, a bar polygonal in cross section mounted in the casing at right angles to and on that side opposite the opening in the said plate, a block in surrounding relation to said bar and slidable longitudinally therealong, a spring in surrounding relation to the bar and bearing against one end of said block to force the. opposite end of the latter against the removable plate, insulating blocks secured respectively on the bottom face of said block and on the top face of the bottom wall of said casing, bowed springs secured respectively on the bottom and top aces of said insulating blocks, and terminals secured to said sprin the opening in the detachable plate provlding for the insertion of means to bear upon the first said.

block to move it against the pressure of said spring so that the bowed springs may be separated to effect the opening of the circuit.

In testimony whereof I afiix my signature.

GUIDO F. S'OHLOTE. 

